Margin-regulating stop



Nov. 1, 1938. i H. c. FOX

MARGIN-REGUL-ATING s' ror Filed July 1, 1937 a/6.. L .& w r

mounted, to accomplish the desired adjustments.

Patented Nov. 1, 1938 UNITED STATES PATENT TOFFICEQ Application July 1, 1937, Serial N0. 151,384

4 Claims.

lective means for releasing severally the stops in relation with a medial fixed abutment for coaction therewith. a I

Another object of my improvem nts is to include in the above train of mechanically cooper-.

ating devices a single tensioning means for actuating the stops singly as desired when said manually selective means is used appropriately in the unlocking of either from a shiftabledentated carrier bar on which they are slidably of either stop as stated.

I have accomplished-the above objects by the 25 means and mechanisms which are illustrated in thereon, and the manually operable rock-bar for the accompanying drawing, described in the specification and claimed'in the appended claims.

It is to be understood that various changes may be effected in the different devices of my invention and their relative positions, without thereby departing from my invention and the scope of the claims.

Figure 1 is aperspectivefrontal view of my invention, as mounted upon spaced side arms of a typewriting machine. Fig. 2 is a top plan of parts of the dentated cross-bar and the pair of stops slidably connected thereto with other and associated elements, other parts being broken away. Figs. 3 and 4 are respectively transverse sections of the cross-bar, the said stops mounted operating the release mechanism of either stop.

Fig. 5 is a medial longitudinal vertical section of the stop shown in Fig. 3, and Fig. 6 is a transverse section of the cross-bar and the stop of Fig. 3, showing the ratchet part of the release stem device disengaged from the teeth of the cross-bar.

Fig. 1 is a perspective view of portions of the shiftable carriage of a typewriting machine, showingmy improved marginal stops releasably secured on a transverse dentated bar thereof, and connected for resilient actuation according to my invention, parts of the carriage frame being broken away, or. otherparts not shown. Fig. 2 is a top plan, with parts broken away, showing the relative associations between the shiftable marginal stops on the dentatedbar, relative to astops. Figs. 3 and 4 are respectively medial cross sections ofthe two marginal stops, and also showing the associated manually operable releasing means therefor.

I have shown in' Fig. 1 a portion of the shiftable carriage I of a typewriting machine, including vertically disposed end supports connected by a cross-bar 5 whose lower edge has a row of detents 5a. On the bar 5'are slidably mounted a pair of marginal stops 9 and I respectively. In Fig. 2 is shown to the rear of the bar a conventional fixed abutment device llb on a backing part II of the machine. There are two abutment devices lib and He, the first relatively fixed, and the other being a rockable stop finger l 10- having an eccentrically disposed lateral screw l I f to be stopped in one direction by the member Ila, and in an opposite direction by a finger part 1 Id engageable with the part Ila.

Referring to Figs. 3 to 6 inclusive, Figs 3rand 4 are transverse sections of the cross-bar 5 with the stops 9 and I0 thereof respectively mounted thereon and in detent engagement therewith.

the similar elements 10, Illa, lflb, lllc and id of Fig. 4. In Fig. 2 are shown the rearward projections 9c of the stop 9, and the rearward projections We and "If of the'stop l0. Figs. 5 and 6 further illustrate the features of the stop 9, Fig. 5 showing the detent 9f in its position separated from the cross-bar 5 but as in a position of the detent as when engaged therewith, while in Fig. 6 the rock-bar 2 is shown as operatively engaged with the cap'projection 9b, and as having pushed down the detents 9f releasing the stop from the cross-bar 5 to permit sliding of the stop'on the cross-bar. In Fig. 6, the cap 90 is depressed by the rock-bar [engaging-and pushing. downwardly on the stud 9d. The cap is integral with a depending stem 9a cylindrical at ,the top and excised lengthwise below with a fiat forward face and having at its lower enda forwardly projecting pair of ratchets 91' adapted to engage in fitting notches of the stop 9. A coiled spring 9b is seated within the cap 90 around the cylindric part of the stem 9a, and is engaged with the top of the stop 9, and when compressed as in Fig. 6

and then released, the spring reacts to return the stem 9a to reengage the ratchets with teeth of the cross-bar 5.

Fig. 4 is a section of the other stop I0, and the above description of the stop 9 and its parts applies also to the like parts of the stop Ill, viz.; as shown at Illa, I02), I00, and Id, excepting the use on the stop I'll of a rearwardly obliquely projecting member Me, which may be stopped by the rockable abutment member He. The stop l0 also has .a rearwardly projecting beveled member I01 used as a bell ringer, as in common practice.

A sheave I5 is rotatably mounted upon the left-hand side standard of the frame I. Another sheave I 4 is rotatably mounted upon the left-hand part of the forward face of the stop H]. A spring drum 1 is rotatably mounted upon a headed screw 6 which is threaded into said left-hand standard. The drum 1 contains a spiral spring 8 whose inner end is secured to the shank of the screw 6, while its outer end is fastened by a rivet 8a to the inner circumferential wall of the drum. A flexible non-extensible cord or cable I! has one termination secured by-a screw l3 to the forward wall of the stop 9 below its division, and is carried to the righthand to and around-the grooved edge of the sheave I4 reversely to the left-hand, thence around the grooved sheave l5 upwardly and to wind upon the circumferential periphery of the drum 1 to which it is end-attached. The spring 8 may be placed under tension by turning the screw axis appropriately, thus placing the cab 12 under lengthwise tension.

A rockable rod 3, of widened or elliptical cross section, has end pintles 2 rockably seated through the side standards of the frame I, the right-hand pintle having a short crankhandle 4 for manual use. The rod 3 is immediately above the upper edge of the dentated bar 5 in spaced relation and parallel therewith, but normally as shown clearing the offset projections 9d and llld of the vertically movable heads 90 and I on the stops 9 and In. In this position of the rod 3, as shown in Figs. 3 and 4, the heads 90 and lllc of said stops are cleared, and the springs 9b and lb which press upon the caps 90 and I00, re-

spectively retain the stops 9 and II] in upper positions with the stop detents 9f engaged with the bar detents a.

When by means of the crank handle 4 the rod 3 is rocked forwardly downwardly, (see Fig. 3), its near edge.part presses down the projection 9d and cap 90, compressing the spring 91), and by this spring pushing down the ratchet 9f,

thus releasing the lower cross part of this stop from the detents of the bar 5.

The released stop 3 may then be slid along the bar 5 to a desired marginal position, and the crank 4 being released, the spring 9b reacts as the rod 3 is rocked to its medial position, the head 9c returning with the stop frame 9 to re-lock it to the bar 5. The spring 8 in the barrel 1 acts in tensioning the cord l2 and stop 9 to move the stop to the right. The stop may be returned slidably when the crank is rocked forwardly. The other stop I0 is controlled in the same manner by rocking the rod 3 rearwardly instead of forwardly, acting to depress the oppositely offset projection Id of the cap Inc.

It will be noticed that the use of the cord or cable l2 as carried from the stop 9 to and around the sheave l4 on the stop [0, and thence reversely to be wound upon the spring barrel, is kept taut, the cord being inextensible, although if a slight extension thereof occurs after much use, the screw axis 6 of the drum I may be adjusted to take up any slackness. The device thus may be manipulated by one hand, which in practice is more convenient for the operator and a saver of time, as compared with a stop device which includes spring drums at both ends of the shiftable frame bar 5.

My device is of relatively simple and inexpensive construction, and with little or no adjustments, may be mounted operatively upon the dentated bar 5 of any make of typewriting'machine or the like.

I claim:

1. A device of the character described, comprising in combination, a shiftable dentated bar, abutments mounted adjacent said bar, releasable marginal stops mounted slidably on the bar for occasional engagements with said abutments, each stop including aresiliently controlled ratchet releasably engaged with teeth of said bar, tension producing means, a cable end-connected thereto, carried.- thence around a part of the remote stop and reversely returned and .end connected to the hither stop, and single reversely rockable-operating means for manual manipulation to engage releasably either ratchet in disengaging it from teeth of said bar to permit sliding of the stop to and fro along the bar separately and adjustably.

2 A device of the character described, comprising in combination, a shiftable dentated bar, abutments mounted adjacent said bar, releas- -able marginal stops mounted slidably on the bar for occasional engagements with said abutments, each stop including a resiliently controlled ratchet releasably engaged with teeth of said bar, a spring drum mounted on one end of said bar, a cable end-connected to and windable on the spring drum, carried thence around a part of. the remote stop and returned reversely with its other end connected to the hither stop, and a reversely rockable shaft positioned along said bar, transversely widened and for manual manipulation to rock it in'either 'of opposite directions to releasably engage and actuate either ratchet separately to disengage it from the bar teeth to permit the stop to be slidably adjusted therealong in a to and fro direction relative to the adjustments of the other stop.

3.'A device of the character described, comprising in combination, a shiftable dentated bar, abutments mounted adjacent said bar, marginal stops mounted slidably on the bar for occasional separate independent releasable engagements with said abutments, each stop including a resiliently controlled ratchet releasably engaged with the bar teeth,,a spring drum mounted at one end of said bar, a cable end-connectedto and windable on said drum, the remote stop having a sheave thereon, another sheave supported on the hither part of said bar device, the cable being reeved around said sheave and connected to the hither stop, and oppositely rockable means for manually disengaging either stop-ratchet from the bar.

4. In apparatus of the character described, a dentated bar, stop means adjacent thereto, a pair of slide-bodies mounted on said dentated bar having ratchets releasably engaged with detents thereof, resilient means on said slide-bodies bearing on said ratchets to normally retain them in engagement with the detents, a single device, oppositely rockable, and to depress either ratchet to release it from the detented bar, and resiliently controlled single means connected to both slide-bodies and operable when either ratchet is released from the detented bar to tensionally move its connected slide-body separately along the bar.

HAROLD C. FOX. 

